Match the definitions with the terms.
genotypes made of two
different alleles
1. alleles
genotypes made of the
same alleles
2. dominant
different forms of genes
for a single trait
3. heterozygous
allele that is expressed
only in the homozygousp
4. homozygous

row 1         row 2

 1                  3

2                  4

3                  1

 4                  5

 5                  2

Explanation

We know that we are diploid organism. So, we have 2 set of chromosome. Each type of chromosome are present in one pair. Each chromosome contains many genes. The position of gene in a chromosome is known as locus. 2 gene, positioned in same locus of the nonsister chromosome ( paired chromosome) are known as allele of each other(*).  

In homozygous condition alleles are in same form.

Example

T/t- allele

TT- tall (homozygous dominant)

Tt- tall (heterozygous dominant)

tt- dwarf (homozygous recessive)

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